Composite section having a supporting base of light-weight metal and at least one metallically-joined, profiled strip and process for manufacturing a composite section

Abstract

A composite section (10) features a base (12) of light-weight metallic material as section component and at least one further profiled section component, in particular a profiled strip (18) of another metallic material which is joined metallically as a surface layer to the base section during an extrusion process. Projecting out of the inner-lying face (21) of the profiled strip (18) and directed at the base (12) is at least one projection and/or an additional element (23) which are/is embedded in the base (12). Each additional element (23) may delimit an undercut space which is filled in an interlocking manner by metallic material of the base (12).

What is claimed is: 
     
       1. Extruded composite section which comprises a support base of a light-weight metal as a profiled section component and at least one further profiled section component having longitudinal edges and an inner-lying face, said further profiled section component and support base being extruded together and having areas of contact therebetween, and said further profiled section component being joined metallically and mechanically as a surface layer to the support base during an extrusion process at the areas of contact therebetween, wherein said further profiled section component is a profiled strip of a metal different from the support base, wherein said further profiled section component including at least one projection extending from the further profiled section component which projects towards the support base, wherein the at least one projection is at least one of thermally and mechanically joined to the inner-lying face of said further profiled section component, wherein said at least one projection delimits at least one undercut space that is filled by metallic material of the support base, is interlocked with the support base and is embedded in the support base, and wherein said at least one projection is arranged such a way to allow the profiled strip containing said at least one projection to be coiled on a reel. 
     
     
       2. Composite according to claim 1, wherein said at least one projection includes at least one row of projections which project from the inner-lying face of the profiled strip between and a distance from its longitudinal edges. 
     
     
       3. Composite according to claim 1, wherein said at least one projection includes at least one channel-shaped section with flanges thereon, wherein its flanges are directed away from the inner-lying face of the profiled strip, wherein recesses are provided in the flanges and wherein the recesses define flange parts. 
     
     
       4. Composite according to claim 3, wherein the recesses define undercut spaces that are filled by metallic material of the support base. 
     
     
       5. Composite according to claim 3, wherein the flanges of the channel-shaped section run at an angle to the inner-lying face which is less than 90°. 
     
     
       6. Composite according to claim 1, wherein said at least one projection includes one wire or rod element which is attached to the profiled strip parallel to its longitudinal edges. 
     
     
       7. Composite according to claim 1, wherein said at least one projection includes bolts as means of anchorage which are attached to the profiled strip, wherein the bolts are blunted cone shaped and forming an undercut ring-shaped surface. 
     
     
       8. Composite according to claim 1, wherein bolts are secured to the inner-lying face of the further profiled section component.